High reactance transformer



April 29, 1947- E. s. GODDARD awn nmcnncm mmsmmmn Filed Aug. 15. 19421;", aud? The windings 8 inner terminals grounded are connected tosupply egative resistance characterwhere the transformer is y luminoustubes.

physical arrangement of the output a illustrated in Fig. 1, it will bethey are not symmetrical with respect c winding 6, and hence it is to hestood that one of the windings has a few dinonal turns so as tocompensate for the n 61118113, thus to provide an electri- 4 relationbetween the primary and in a suitable case formed of e appreciated thatthe case is to the windings 6 to 9. Thus in providing leakage reactanceadd ion to the magnetic shunts H and Zfi' tnerin re, a leakage path isprovided heprirnazy winding 8 and the auxiliary so that where a. case isused this leaktaken into consideration in determindesign of theauxiliary winding and the 'royided between the primary auxiliary virtueof influence difiere'nt load con- ""lfi'v'ififid by such l operate to tcurrent windings a .9. Thus kage reactance tends to com I together theinput winding changes in accordyalue oi the load Er. so stance providedby the silt one which varies in The curve ll repret which has beenprovided reactance designed for a par-= Tne curve l represents theecteristics of the transformer these two curves it will readily uchwider load range of operan ne for aparticular power factor 1 shown thanby former arillustrated by the curve H.

onic frequencies mere-by re- :able improvement in opera- 1i transformerarrangement of the use type therefore is particularly sultver noappreciable range 0! loads g those loads having negative resistanceistics, although other types of loads may be used. There is alsoconsiderable 1mement oi the reduction of harmonic influ. ence of thepower line.

While for the purposes of illustration a particular arrangement has beendescribed, it is to be understood that variations may be made in thearrangement and in the circuit instrumentallties employed withoutdeparting from the spirit and scope of my invention as defined in theappended claims.

What I claim as new and desire to secure by letters Patent 01' theUnited States is:

1. A high leakage reactance transiormer comprising a magnetic corestructure having thereon a primary winding adapted to be connected to asource of alternating current, an auxiliary winding mounted on said corestructure directly ad- Jacent one end of said primary winding, one endof said auxiliary winding being connected to the adjacent end of saidprimary winding, a capacitor connected between the other ends of saidauxiliary winding and said primary winding, and a divided secondarywinding arranged on said core a cture so as to bebalanced in voltagewith ect to said primary winding, said core stru e having high leakagereactance paths between said secondary winding and said first mentionedwindings.

2. A high leakage reactance transformer comprising a magnet .xzrestructure having thereon an input windin' adapted to be connected to asource oi aiterna g current, an output winding supported by said corestructure and arranged tobe in electrically balanced relation to saidinput winding, said core structure being provided with magnetic shuntmeans between said windings, an auxiliary winding mounted adjacent saidinput winding on the same leg of said core structure, and a capacitorconnected across said auxiliary winding and said input winding.

3. A high reactance high power factor transformer arrangement comprisinga primary winding, an auxiliary winding positioned directly adjaoentthereto and being directly connected to said winding, a capacitorconnected across both sold windings, a midpoint grounded secondarywindins, and a magnetic core structure for said windings, said corestructure being provided with magnetic shunt portions positioned betweensaid secondary winding and said other windings to provide high leakagereactance characteristics.

EDWIN G. GODDARD.

aaraaancas man The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,212,198 Sole. M Aug. 20, 19102,265,700 Outt w Dec. 9, 1941 1,950,395 Boucher Mar. 13, 1934 2,358,725Mauerer W Sept. 19, 1944 FOREIGN PAI'ENTB Number (bunny Date 627,866French i...,.......,. June 21, 1927

